D.7.A Delta T Parameters; D.7.B Flue Limitation Parameters; D.7.C Outlet Limitation Parameters - Bradford White OmniTech BONH1250 Installation And Operation Instructions Manual
Category ii and iv venting with touchscreen controls
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8.D.7.a
Delta T Parameters
To navigate to the Delta T Parameters Screen, touch the Temp Limits Icon on the Configuration Screen, then touch the Delta T
Parameters button on the Temperature Limits Parameters Screen.
The Delta T Parameters Screen allows adjustment of the following parameters:
• Enable/Disable – Enables/disables the Delta T temperature functionality.
• Delta T Temp Max – The Delta T temperature at which the boiler/heater will shut down
due to a high Delta T temperature condition.
• Delta T Temp Min – The temperature difference between the unit's inlet and outlet
at which the boiler/heater will begin to de-rate to prevent a Delta T shut down
condition.
8.D.7.b
Flue Limitation Parameters
To navigate to the Flue Limitation Parameters Screen, touch the Temp Limits Icon on the Configuration Screen, then touch the
Flue Limitation button on the Temperature Limits Parameters Screen.
The Flue Limitation Parameters Screen allows adjustment of the following parameters:
• Manual Reset Flue – The temperature at which the unit will shut down due to exceeding a flue temperature manual reset
condition.
• Flue Temp MIN – The flue temperature at which the unit will begin to de-rate, in an attempt to prevent a manual reset high
flue temperature condition.
• Flue Temp Max – The flue temperature at which the unit will run at minimum firing
rate conditions.
8.D.7.c
Outlet Limitation Parameters
To navigate to the Outlet Limitation Parameters Screen, touch the Temp Limits Icon on the Configuration Screen, then touch
the Outlet Limitation button on the Temperature Limits Parameters Screen.
The Outlet Limitation Parameters Screen allows adjustment of the following parameters:
• Outlet Temp Min – The outlet temperature at which the boiler/heater will begin to de-rate, in an attempt to prevent a
manual reset high temperature outlet shut down condition.
• Outlet Temp Max – The outlet temperature at which the boiler/heater will shut down on a manual reset high temperature
outlet condition.
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